EP 2476997 A2 20120718 - Electronic level device and level staff associated thereto
Title (en)
Electronic level device and level staff associated thereto
Title (de)
Elektronische Niveaumessvorrichtung und dazugehörige Nivellierlatte
Title (fr)
Dispositif électronique de nivellement et barre de nivellement associée
Publication
Application
Priority
JP 2011004492 A 20110113
Abstract (en)
An electronic level includes a wide-angle lens system having a two-dimensional imaging element configured to form thereon a picture image including an image of a level staff assigned with a code pattern, an extraction part configured to extract the image of the level staff from the picture image, a height-level measurement value calculation part configured to obtain a height-level measurement value indicated by a portion of the code pattern in the image of the level staff extracted by the extraction part, the portion of the code pattern located at a collimation optical axis of the wide-angle lens system, and a calculation part configured to calculate a collimation height from the height-level measurement value.
IPC 8 full level
G01C 5/00 (2006.01); G01C 15/06 (2006.01)
CPC (source: EP US)
G01C 5/00 (2013.01 - EP US); G01C 9/00 (2013.01 - US); G01C 15/06 (2013.01 - EP US)
Citation (applicant)
- JP H07229737 A 19950829 - TOPCON CORP
- JP 3795190 B2 20060712
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2476997 A2 20120718; EP 2476997 A3 20160518; EP 2476997 B1 20190626; JP 2012145463 A 20120802; JP 5688300 B2 20150325; US 2012182418 A1 20120719; US 9121698 B2 20150901
DOCDB simple family (application)
EP 12150509 A 20120109; JP 2011004492 A 20110113; US 201213348538 A 20120111